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To: Martin Wilck <Martin.Wilck@fujitsu-siemens.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: IO delay, port 0x80, and BIOS POST codes
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From: Andi Kleen <ak@suse.de>
Date: 15 Mar 2002 12:51:44 +0100
In-Reply-To: Martin Wilck's message of "15 Mar 2002 12:46:28 +0100"
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Martin Wilck <Martin.Wilck@fujitsu-siemens.com> writes:

> On Thu, 14 Mar 2002, Thunder from the hill wrote:
> 
> > I also remember this been discussed anually. Making it configurable with
> > a warning might be a solution, but that's nothing we could decide. Maybe
> > add a config option? It night be a [DANGEROUS] one, so the guys and gals
> > who might compile are warned of changing this.
> 
> It doesn't even have to be a config option - a line
> 
> /* Port used for dummy writes for I/O delays */
> /* Change this only if you know what you're doing ! */
> #define DUMMY_IO_PORT 0x80
> 
> in a header file would perfectly suffice.

That effectively already exists. You just need to change the __SLOW_DOWN_IO
macro in include/asm-i387/io.h

-Andi
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